Improvement in air-vents for steam-radiators



I e. w. BLAKE.

AIR-VENT FOR STEAM-RADIATOR.

Patented Dec. "7,1875.

l iiljeesses. W 4 g2 MFETERS, FNDTOUTHOGRAPHER, WASHINGTON, D c.

UNITED STATES PATENT OFFICE.

GEORGE W. BLAKE, OF NEW YORK, N. Y.

IMPROVEMENT IN AlR-VENTS FOR STEAM-RADIATORS.

Specification forming part of Letters Patent No. 170,808, dated December 7, 1875; application filed November 18, 1875.

To all whom it may concern:

Be it known that I, GEORGE W. BLAKE, of

the city, county, and State of New York, have invented a new and useful Improvement in Air-Vents for Steam-Radiators and I do here by declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawing, which forms part of this specification.

In air-vents for steam-radiators, used to prevent the choking of the radiator or pipes leading thereto with air, and to secure a free cir culation for the steam through the radiator, the following difficulty, which is the object of my invention to avoid, has been experienced. Thus, whether the air-vent be connected with the sewer, or he simply formed by a cock openin g into the apartment containing the radiator, it is desirable to have the vent-opening as small as possible, so as to prevent the waste and annoyance of escaping steam after the air has been expelled by the latter. A very fine vent-opening, however, is apt to choke with dust or dirt; and the same is inaccessible for clearing purposes when opening into the sewer also, diflicult or impossible to clear when made in a cock which opens into the apartment. Hence, such air-vents are usually made much larger than otherwise would be necessary, and there is an annoying and wasteful escape of steam.

My invention consists in a single air-vent or device connected with the radiator, and either opening into the apartment containing the radiator, or communicating with the sewer or elsewhere, as desired, in which a clearing-pin, capable of easy manipulation, serves to contract the vent-opening or escape-orifice, and to keep the latter clear of all particles or matter liable to choke the air-vent, which thus may be made as small as desired.

Figure 1 represents a longitudinal section of an air-vent constructed in accordance with my improvement, and Fig. 2 a transverse section thereof on the line a: m.

A is a socket, which may be connected by a screw-thread, a, with the radiator, and which is internally constructed at its connecting end with an air-vent opening or escape-orifice, b. B is a clearing-pin, arranged to enter or project within and through said orifice, but of slightly less transverse area than the latter, so as to leave a contracted passage around the pin within the orifice b. This pin is attached to a spindle, B, which passes out through a stuffing-box, O, at the other end of the socket,

and said spindle and pin made capable of a A limited longitudinal motion by means of the hand applied to a button, d.

In this way or by these means a simple tremulous motion of the hand will serve to work the clearing-pin B back and forth, and so clear the escape-orifice b. The expelled air and escaping steam pass 011' from the interior of the socket by an outlet, 9, which may or may not connect with the sewer.

The passage for the escaping air being so very contracted by means of the clearing-pin, the vent, in the majority of cases, may be left permanently open, as shown in the drawing; but, if desired, it may be made to open and close, by providing the spindle B with a valve herein set forth.

GEO. W. BLAKE.

Witnesses:

MICHAEL RYAN, FRED. HAYNES. 

